Question

For a spherical mirror of object distance u , image distance v and focal length f then correct expression for magnitude is
a) m = f - v/f
b) m = f/f -v
c) m = f - u/f
d) m = f /f -u​

Answer 1

Explanation:

1/f = 1/u + 1/v

M = - v/u

v/f = v/u + 1

v/u = v/f - 1

- v/u = 1 - v/f

M = (f -v)/f